Transformer mounting pad



FIG. 1 is a top perspective illustration of a transformer mounting pad embodying my new design;

FIG. 2 is a bottom perspective illustration;

FIG. 3 is a side plan view;

FIG. 4 is a top plan view;

FIG. 5 is a rear plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a transformer mounting pad, as shown. 